2010021021221 has 8 divisors (see below), whose sum is σ = 2010682395288. Its totient is φ = 2009359744000.

The previous prime is 2010021021193. The next prime is 2010021021227. The reversal of 2010021021221 is 1221201200102.

It can be written as a sum of positive squares in 4 ways, for example, as 266601832225 + 1743419188996 = 516335^2 + 1320386^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2010021021221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2010021021196 and 2010021021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2010021021227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77771261 + ... + 77797101.

It is an arithmetic number, because the mean of its divisors is an integer number (251335299411).

Almost surely, 2^{2010021021221} is an apocalyptic number.

It is an amenable number.

2010021021221 is a deficient number, since it is larger than the sum of its proper divisors (661374067).

2010021021221 is a wasteful number, since it uses less digits than its factorization.

2010021021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48423.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 2010021021221 its reverse (1221201200102), we get a palindrome (3231222221323).

The spelling of 2010021021221 in words is "two trillion, ten billion, twenty-one million, twenty-one thousand, two hundred twenty-one".